Option variable
ieqnprintDefault value: true
ieqnprint governs the behavior of the result
returned by the ieqn command. When ieqnprint is
false, the lists returned by the ieqn function are of the form
[solution, technique used, nterms, flag]
where flag is absent if the solution is exact.
Otherwise, it is the
word approximate or incomplete corresponding to an inexact or
non-closed form solution, respectively. If a series method was used,
nterms gives the number of terms taken (which could be less than the n
given to ieqn if an error prevented generation of further terms).